摘要
研究了一类基于主动队列管理(active queue management,AQM)路由器的多链路网络拥塞控制问题。用一个状态空间模型来描述多链路网络流量的动态特性,并将实际链路带宽相对于期望带宽的偏差作为干扰信号,从而用H∞控制方法来解决网络拥塞问题。在链路带宽变化的情况下,通过丢包率来控制实际窗口大小及队列长度,使得实际窗口大小和队列长度达到期望值,从而达到降低网络拥塞的目的。最后通过两个仿真示例验证了方法的有效性。
The congestion control problem is investigated based on a class of multi link networks with active queue management （AQM） routers, A state-space model is used to describe the dynamic properties of the multilink network flow, and the discrepancy between available link bandwidth and nominal link bandwidth is considered as a disturbance. Then, the network congestion problem is solved by using the H∞ control approach. The size of actual window and length of queue are adjusted to the reference values by the packet dropout rate under the change of the available link bandwidth, and thus the congestion control purpose is achieved. Finally, two simulations show the effectiveness of the proposed method.
出处
《系统工程与电子技术》
EI
CSCD
北大核心
2009年第8期1930-1934,共5页
Systems Engineering and Electronics
基金
国家自然科学基金(60834003)
国家杰出青年科学基金(60525304)资助课题
关键词
拥塞控制
多链路网络
H∞控制
主动队列管理
congestion control
multi-link network
H∞ control
active queue management
